CN110777958B - Beam column node displacement amplification damping device with restorable function - Google Patents
Beam column node displacement amplification damping device with restorable function Download PDFInfo
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- CN110777958B CN110777958B CN201911097158.4A CN201911097158A CN110777958B CN 110777958 B CN110777958 B CN 110777958B CN 201911097158 A CN201911097158 A CN 201911097158A CN 110777958 B CN110777958 B CN 110777958B
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- mounting plate
- gear
- displacement amplification
- shape memory
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/62—Insulation or other protection; Elements or use of specified material therefor
- E04B1/92—Protection against other undesired influences or dangers
- E04B1/98—Protection against other undesired influences or dangers against vibrations or shocks; against mechanical destruction, e.g. by air-raids
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04H—BUILDINGS OR LIKE STRUCTURES FOR PARTICULAR PURPOSES; SWIMMING OR SPLASH BATHS OR POOLS; MASTS; FENCING; TENTS OR CANOPIES, IN GENERAL
- E04H9/00—Buildings, groups of buildings or shelters adapted to withstand or provide protection against abnormal external influences, e.g. war-like action, earthquake or extreme climate
- E04H9/02—Buildings, groups of buildings or shelters adapted to withstand or provide protection against abnormal external influences, e.g. war-like action, earthquake or extreme climate withstanding earthquake or sinking of ground
- E04H9/021—Bearing, supporting or connecting constructions specially adapted for such buildings
Abstract
The invention discloses a beam-column node displacement amplification damping device with a restorable function, wherein two ends of a displacement amplification mechanism are respectively provided with a magnetorheological fluid damper, and a cylinder body of the magnetorheological fluid damper at each end is connected with the displacement amplification mechanism; the piston rod of one magnetorheological fluid damper is hinged with the first mounting plate, the piston rod of the other magnetorheological fluid damper is hinged with the second mounting plate, each magnetorheological fluid damper is sleeved with a shape memory alloy spring, one end of each shape memory alloy spring is connected with the cylinder body, the other end of each shape memory alloy spring is connected with the piston rod, the sensor is used for collecting stress information of the shape memory alloy springs and sending the stress information to the controller, and the controller is used for controlling the damping size of the magnetorheological fluid damper according to the received stress information. The invention can ensure the structural safety of the frame structure under various earthquake actions, avoid the serious damage to the beam-column node, have good shock absorption and energy dissipation effects and can reset the beam-column node.
Description
Technical Field
The invention belongs to the technical field of energy dissipation and shock absorption of a frame structure and self-resetting of post-earthquake beam-column nodes, and particularly relates to a beam-column node displacement amplification shock absorption device with a restorable function.
Background
In order to meet the demand of increasingly diversified building forms in modern society, the building height and span are continuously increased, and therefore, the cooperative development of structures and related design theories is required. The frame construction can better satisfy the building function requirement, but frame construction also has some shortcomings simultaneously: the stress of the frame node is complex under the action of earthquake, the stress concentration is obvious, and the beam-column node is seriously damaged; the lateral rigidity of the frame structure is small, the horizontal displacement of the structure is large under the action of rare earthquakes, and after the earthquakes are finished, the node of a common beam column is seriously damaged and is difficult to repair.
Disclosure of Invention
Aiming at the technical problems in the prior art, the invention provides a beam-column node displacement amplification damping device with a restorable function, which can ensure the structural safety of a frame structure under various earthquake actions, avoid the beam-column node from being seriously damaged, have good damping and energy dissipation effects and can reset the beam-column node.
In order to solve the technical problems, the invention solves the problems by the following technical scheme:
a displacement amplification and shock absorption device with a restorable function for a beam-column joint comprises: the displacement amplifying mechanism is used for amplifying and converting angular displacement generated by a beam-column node into horizontal displacement, two ends of the displacement amplifying mechanism are respectively provided with one magnetorheological fluid damper, and a cylinder body of the magnetorheological fluid damper at each end is connected with the displacement amplifying mechanism; the piston rod of one magnetorheological fluid damper is hinged with the first mounting plate, the piston rod of the other magnetorheological fluid damper is hinged with the second mounting plate, each magnetorheological fluid damper is sleeved with the shape memory alloy spring, one end of each shape memory alloy spring is connected with the cylinder body, the other end of each shape memory alloy spring is connected with the piston rod, the sensor is used for collecting stress information of the shape memory alloy springs and sending the stress information to the controller, and the controller is used for controlling the damping size of the magnetorheological fluid damper according to the received stress information.
Further, the displacement amplification mechanism comprises a special-shaped toothed plate, a coaxial displacement amplification gear and a connecting rod, the special-shaped toothed plate is mounted on the first mounting plate, two ends of the toothed plate are respectively connected with the cylinder body, the coaxial displacement amplification gear passes through the connecting rod and is hinged to the second mounting plate, the coaxial displacement amplification gear comprises a first gear and a second gear, the first gear is fixedly connected with the second gear in a coaxial mode, the diameter of the first gear is smaller than that of the second gear, the first gear is meshed with the special-shaped toothed plate, and the second gear is meshed with the toothed plate.
Furthermore, a first baffle plate is arranged between the two ends of the toothed plate and the cylinder body, a second baffle plate is respectively installed on each piston rod, one end of the shape memory alloy spring is connected with the first baffle plate, and the other end of the shape memory alloy spring is connected with the second baffle plate.
Further, the one end that is close to on the dysmorphism pinion rack first gear is the arc structure of evagination, and tooth has been seted up at the arc position.
Furthermore, one end of the first mounting plate is connected with one end of the second mounting plate to form an L shape.
Further, the distance between the hinge point of the first mounting plate and the piston rod and the connection point of the first mounting plate and the second mounting plate is greater than the distance between the hinge point of the second mounting plate and the piston rod and the connection point of the first mounting plate and the second mounting plate.
Further, the controller adopts a 51-chip microcomputer.
Further, in use, the first mounting plate is mounted on a beam and the second mounting plate is mounted on a column.
Compared with the prior art, the invention has at least the following beneficial effects: under the action of earthquake, the invention amplifies the displacement of beam column nodes under the action of earthquake by the combined action of the special-shaped toothed plate at the upper part, the coaxial displacement amplification gear and the toothed plate at the lower part, and transmits the amplified displacement to the magnetorheological fluid damper and the shape memory alloy spring. The damping of the magnetorheological fluid damper under different earthquake action conditions is adjusted through a variable output voltage system of the controller, so that the aim of semi-active control is fulfilled. The energy transferred to the structure by the earthquake action is consumed by the motion of the piston rod in the magnetorheological fluid damper and the deformation of the shape memory alloy spring, so that the structure is protected. After the earthquake is finished, the shape memory alloy spring is restored to the initial state before the earthquake action, and the displacement is transmitted to the beam column node through the special-shaped toothed plate, the toothed plate and the coaxial displacement amplifying gear, so that the beam column node is restored to the initial state.
Further, displacement mechanism of enlargiing includes special-shaped toothed plate, the pinion rack, coaxial displacement amplification gear and connecting rod, special-shaped toothed plate installs on first mounting panel, the both ends of pinion rack are connected with the cylinder body respectively, coaxial displacement amplification gear passes through the connecting rod and articulates with the second mounting panel, coaxial displacement amplification gear includes first gear and second gear, first gear and the coaxial fixed connection of second gear, and the diameter of first gear is less than the diameter of second gear, first gear and the meshing of special-shaped toothed plate, second gear and the meshing of pinion rack, such structural design, can enlarge and convert the angle displacement that the beam column node takes place into horizontal displacement, moreover, the steam generator is simple in structure, and easy installation.
Furthermore, the baffle plate is arranged, so that the installation of the shape memory alloy spring is facilitated.
Further, the one end that is close to first gear on the dysmorphism pinion rack is the arc structure of evagination, and tooth has been seted up at the arc position, and the transmission power that bellied arc structure can be fine.
Further, because the destruction that transverse wave caused is far greater than the destruction that longitudinal wave caused in the earthquake, so the pin joint of first mounting panel and piston rod is greater than the pin joint of second mounting panel and piston rod and is greater than the distance between the pin joint of first mounting panel and second mounting panel to the tie point of first mounting panel and second mounting panel, first mounting panel is connected with the roof beam, second mounting panel and column connection, can make damping device damping effort in the transverse wave direction be greater than the longitudinal wave direction, better play the shock attenuation effect, the protection housing construction receives the destruction of transverse wave.
In order to make the aforementioned and other objects, features and advantages of the present invention comprehensible, preferred embodiments accompanied with figures are described in detail below.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a schematic diagram of the arrangement of the apparatus of the present invention;
FIG. 2 is a front view of the principal apparatus of the present invention;
FIG. 3 is a side view of the primary apparatus of the present invention;
FIG. 4 is a cross-sectional view of the principal structure of the magnetorheological fluid damper of the apparatus of the present invention;
FIG. 5 is a side view of the coaxial displacement amplification gear of the principal structure of the device of the present invention;
fig. 6 is a front view of the coaxial displacement amplifying gear of the main structure of the device of the present invention.
In the figure: 1-a first mounting plate; 2-a second mounting plate; 3-a special-shaped toothed plate; 4-toothed plate; 5-coaxial displacement amplification gear; 51-a first gear; 52-a second gear; 6-cylinder body; 7-a piston; 8-a piston rod; 9-a coil; 10-magnetorheological fluid; 11-a shape memory alloy spring; 12-a first baffle; 13-a second baffle; 14-a connecting rod; 15-a single chip microcomputer; 16-a power supply control circuit; 17-a beam; 18-column.
Detailed Description
To make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings, and it is apparent that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1 to 4, as an embodiment of the present invention, a beam-column node displacement amplification damping device with a restorable function includes: the magnetorheological damper comprises a first mounting plate 1, a second mounting plate 2, a first baffle 12, a second baffle 13, a shape memory alloy spring 11, a sensor, a controller, a magnetorheological damper and a displacement amplifying mechanism, wherein as shown in figures 1 and 2, one end of the first mounting plate 1 is connected with one end of the second mounting plate 2 to form an L shape, when the magnetorheological damper is used, the first mounting plate 1 is fixedly connected with a beam 17, and the second mounting plate 2 is fixedly connected with a column 18. The displacement amplification mechanism is used for amplifying and converting angular displacement generated by a beam column node into horizontal displacement, two ends of the displacement amplification mechanism are respectively provided with a magnetorheological fluid damper, specifically, as shown in fig. 2, the displacement amplification mechanism comprises a special-shaped toothed plate 3, a toothed plate 4, a coaxial displacement amplification gear 5 and a connecting rod 14, the special-shaped toothed plate 3 is welded on the first mounting plate 1, two ends of the toothed plate 4 are respectively welded with a first baffle plate 12, and a cylinder body 6 of the magnetorheological fluid damper is welded with the other surface of the first baffle plate 12; the coaxial displacement amplification gear 5 is hinged to the second mounting plate 2 through the connecting rod 14, as shown in fig. 5 and 6, the coaxial displacement amplification gear 5 comprises a first gear 51 and a second gear 52, the first gear 51 is coaxially connected with the second gear 52, the diameter of the first gear 51 is smaller than that of the second gear 52, one end, close to the first gear 51, of the special-shaped toothed plate 3 is of an outwards-convex arc structure, teeth are formed in the arc part, the first gear 51 is meshed with the special-shaped toothed plate 3, the second gear 52 is meshed with the toothed plate 4, the coaxial displacement amplification gear 5 and the special-shaped toothed plate 3 and the toothed plate 4 jointly act, the angular displacement of the beam column node under the earthquake action is converted into horizontal displacement, the displacement is amplified, and the larger the displacement is, and the more energy consumption is exerted on the damper.
As shown in fig. 2, a piston rod 8 of one magnetorheological fluid damper is hinged to a first mounting plate 1, a piston rod 8 of the other magnetorheological fluid damper is hinged to a second mounting plate 2, and the distance from the hinged point of the first mounting plate 1 and the piston rod 8 to the connecting point of the first mounting plate 1 and the second mounting plate 2 is greater than the distance from the hinged point of the second mounting plate 2 and the piston rod 8 to the connecting point of the first mounting plate 1 and the second mounting plate 2. Each piston rod 8 is welded with a second baffle 13, each magnetorheological damper is sleeved with a shape memory alloy spring 11, one end of each shape memory alloy spring 11 is welded with the first baffle 12, and the other end of each shape memory alloy spring 11 is welded with the second baffle 13.
The sensor is arranged on the first baffle plate 12 and used for collecting the pushing force or pulling force information received by the first baffle plate 12, namely the stress information of the shape memory alloy spring 11, and sending the stress information to the controller, and the controller is used for controlling the damping size of the magnetorheological fluid damper according to the received stress information, in the embodiment, the controller adopts a 51-chip microcomputer 15. The damping of the magnetorheological fluid damper under different earthquake actions is adjusted by the 51-based single chip microcomputer 15. Specifically, the first baffle 12 is extruded or stretched under the action of the toothed plate 4, a sensor on the first baffle 12 can detect the magnitude of the force, the sensor transmits the force information to the single chip microcomputer, the single chip microcomputer processes data, the single chip microcomputer outputs a control signal to the magnetorheological fluid damper to control the magnitude of current in the coil 9, after the current of the coil is changed, the magnetic field strength generated by the coil is changed accordingly, the viscosity of magnetorheological fluid is changed correspondingly, the magnetorheological fluid damper is changed finally, the output damping force of the magnetorheological fluid damper is changed, namely the damping of the magnetorheological fluid damper is regulated and controlled by the magnitude of the input current, and therefore the force applied to the baffle in the whole process and the damping of the magnetorheological fluid damper generate a corresponding relation.
The middle of a piston rod 8 of the magnetorheological fluid damper is provided with a hole, a power supply control circuit 16 (a variable output voltage system circuit) is connected with a coil 9 of the magnetorheological fluid damper along the hole, and magnetorheological fluid 10 is filled in a cylinder body 6 of the magnetorheological fluid damper.
In a specific embodiment of the present invention, the first mounting plate 1 and the second mounting plate 2 are respectively and reliably fixed on the beam-column joint, so as to ensure that the first mounting plate 1 and the second mounting plate 2 can move together with the beam-column when an earthquake occurs. The special-shaped toothed plate 3 on the upper portion is welded on the first mounting plate 1, two ends of the toothed plate 4 on the lower portion are respectively welded with the cylinder bodies 6 of the two magnetorheological fluid dampers, piston rods 8 of the two magnetorheological fluid dampers are respectively hinged with the first mounting plate 1 and the second mounting plate 2, the coaxial displacement amplification gear 5 is hinged with the second mounting plate 2 through the connecting rod 14, a small gear (a first gear 51) is in close contact with the special-shaped toothed plate 3 on the upper portion, and a large gear (a second gear 52) is in close contact with the toothed plate 4 on the lower portion and can generate relative sliding. The first baffle plate 12 and the second baffle plate 13 are respectively welded on the cylinder body 6 of the magnetorheological fluid damper and the piston rod 8 of the magnetorheological fluid damper, the shape memory alloy spring 11 is wound on the magnetorheological fluid damper, and the two ends of the shape memory alloy spring are respectively welded on the first baffle plate 12 and the second baffle plate 13.
The working principle of the invention is as follows: when an earthquake occurs, the beam column generates relative displacement under the action of earthquake force, the special-shaped toothed plate 3 in the device drives the small gear in the coaxial displacement amplification gear 5 to rotate, the large gear in the coaxial displacement amplification gear 5 drives the toothed plate 4 to generate relative displacement, and the displacement generated by the earthquake action is amplified in the process; the toothed plate 4 transmits the displacement to the magnetorheological fluid damper, and the damping of the magnetorheological fluid damper under different earthquake action conditions is adjusted based on the 51 single-chip microcomputer 15, so that the purpose of semi-active control is achieved. A large amount of energy transferred to the structure under the action of an earthquake is consumed by the movement of the piston rod 8 in the magnetorheological fluid damper and the deformation of the shape memory alloy spring 11, so that the structure is protected. After the earthquake, the shape memory alloy spring 11 provides structural restoring force (can be electrified and heated), namely the shape memory alloy spring 11 restores to the initial state before the earthquake action, and the displacement is transmitted to the beam column node through the special-shaped toothed plate 3, the toothed plate 4 and the coaxial displacement amplifying gear 5, so that the beam column node restores to the initial state.
Finally, it should be noted that: the above-mentioned embodiments are only specific embodiments of the present invention, which are used for illustrating the technical solutions of the present invention and not for limiting the same, and the protection scope of the present invention is not limited thereto, although the present invention is described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: any person skilled in the art can modify or easily conceive the technical solutions described in the foregoing embodiments or equivalent substitutes for some technical features within the technical scope of the present disclosure; such modifications, changes or substitutions do not depart from the spirit and scope of the embodiments of the present invention, and they should be construed as being included therein. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (7)
1. A beam column node displacement amplification damping device with a restorable function is characterized by comprising: the magnetorheological damper comprises a first mounting plate (1), a second mounting plate (2), a shape memory alloy spring (11), a sensor, a controller, a magnetorheological damper and a displacement amplification mechanism, wherein the first mounting plate (1) is used for being connected with a beam (17), the second mounting plate (2) is used for being connected with a column (18), the displacement amplification mechanism is used for amplifying and converting angular displacement generated by a beam-column node into horizontal displacement, two ends of the displacement amplification mechanism are respectively provided with the magnetorheological damper, and a cylinder body (6) of the magnetorheological damper at each end is connected with the displacement amplification mechanism; a piston rod (8) of one magnetorheological fluid damper is hinged with the first mounting plate (1), a piston rod (8) of the other magnetorheological fluid damper is hinged with the second mounting plate (2), each magnetorheological fluid damper is respectively sleeved with the shape memory alloy spring (11), one end of each shape memory alloy spring (11) is connected with the cylinder body (6), the other end of each shape memory alloy spring is connected with the piston rod (8), the sensor is used for acquiring stress information of the shape memory alloy springs (11) and sending the stress information to the controller, and the controller is used for controlling the damping size of the magnetorheological fluid damper according to the received stress information;
the displacement amplification mechanism comprises a special-shaped toothed plate (3), a toothed plate (4), a coaxial displacement amplification gear (5) and a connecting rod (14), the special-shaped toothed plate (3) is installed on the first mounting plate (1), two ends of the toothed plate (4) are respectively connected with a cylinder body (6), the coaxial displacement amplification gear (5) is hinged to the second mounting plate (2) through the connecting rod (14), the coaxial displacement amplification gear (5) comprises a first gear (51) and a second gear (52), the first gear (51) is fixedly connected with the second gear (52) in a coaxial mode, the diameter of the first gear (51) is smaller than that of the second gear (52), the first gear (51) is meshed with the special-shaped toothed plate (3), and the second gear (52) is meshed with the toothed plate (4).
2. The beam-column node displacement amplification and shock absorption device with the restorable function according to claim 1, wherein a first baffle plate (12) is arranged between two ends of the toothed plate (4) and the cylinder body (6), a second baffle plate (13) is respectively mounted on each piston rod (8), one end of the shape memory alloy spring (11) is connected with the first baffle plate (12), and the other end of the shape memory alloy spring is connected with the second baffle plate (13).
3. The beam column node displacement amplification and shock absorption device with the restorable function according to claim 1, wherein one end, close to the first gear (51), of the special-shaped toothed plate (3) is of an arc structure protruding outwards, and teeth are formed in the arc portion.
4. The recoverable beam-column node displacement amplification and shock absorption device according to claim 1, wherein one end of the first mounting plate (1) is connected with one end of the second mounting plate (2) to form an L shape.
5. A recoverable beam-column nodal displacement amplification shock-absorbing device according to claim 4 wherein the distance between the point of articulation of the first mounting plate (1) with the piston rod (8) to the point of attachment of the first mounting plate (1) to the second mounting plate (2) is greater than the distance between the point of articulation of the second mounting plate (2) with the piston rod (8) to the point of attachment of the first mounting plate (1) to the second mounting plate (2).
6. The beam-column node displacement amplification damping device with the restorable function as claimed in claim 1, wherein the controller is a 51-chip microcomputer.
7. A recoverable beam-column nodal displacement amplifying and shock absorbing device according to any one of claims 1 to 6 wherein in use said first mounting plate (1) is mounted to a beam (17) and said second mounting plate (2) is mounted to a column (18).
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| Application Number | Priority Date | Filing Date | Title |
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| CN201911097158.4A CN110777958B (en) | 2019-11-11 | 2019-11-11 | Beam column node displacement amplification damping device with restorable function |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201911097158.4A CN110777958B (en) | 2019-11-11 | 2019-11-11 | Beam column node displacement amplification damping device with restorable function |
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| CN110777958A CN110777958A (en) | 2020-02-11 |
| CN110777958B true CN110777958B (en) | 2021-02-19 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111691440B (en) * | 2020-06-24 | 2021-07-23 | 江西理工大学 | Displacement amplification device for slope early warning |
| CN115110658B (en) * | 2022-08-09 | 2023-08-25 | 郑州大学 | Reset energy consumption assembly of wood shear wall |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AU2001245982A1 (en) * | 2000-03-29 | 2001-10-08 | The Research Foundation Of State University Of New York At Buffalo | Highly effective seismic energy dissipation apparatus |
| JP4062259B2 (en) * | 2004-01-30 | 2008-03-19 | 東海ゴム工業株式会社 | Displacement amplification type vibration control structure of detached house building |
| CN203742014U (en) * | 2014-02-21 | 2014-07-30 | 上海大学 | Oil damper with displacement amplification device |
| CN106402234A (en) * | 2016-11-08 | 2017-02-15 | 四川工程职业技术学院 | Magnetorheological elastomer shock absorber |
| CN107119958B (en) * | 2017-06-20 | 2022-05-10 | 大连理工大学 | Gear transmission amplification type node shear damper |
| CN107829504B (en) * | 2017-10-29 | 2019-07-02 | 内蒙古北方时代设计研究院股份有限公司 | A kind of energy consuming components for frame structure |
| CN208105565U (en) * | 2018-03-15 | 2018-11-16 | 西京学院 | A kind of compound magnetorheological fluid energy consumer |
| CN108643666B (en) * | 2018-03-24 | 2020-02-11 | 北京工业大学 | Damper of efficient space utilization type end direct-support secondary displacement amplification device |
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